Basically what the title of the thread says. What are some? Anything you can think of would be appreciated (of course you can make a new post or edit the post if you think of something you'd initially omitted). It could also be a small mission that is not as well known. Only restriction is no XL stuff please (and has to be single player).

I already have seen: D1 LOTW/D1 AE levels, Cascade Aqueduct, Teralagon, Tyrsis, Marzipan, and Legacy of Chaos. No need to mention any of those as such.